Question: When was Vitebsk's population 369,543?
Paraphrase: Tell me when 369,543 people lived in Vitebsk.
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q102217 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '369543.0')) . ?s pq:P585 ?value}